These are under dresses or nightgowns. At first I drew the one with the ruffle, but then I found it didn't fit very nicely under the dressing gown that I also wanted to draw. So I made another version without the ruffle. There was also a version with shorter ruffle, but I probably I was already grown used to the proportions of the first one, so it looked weird to me. So I am posting those two.

The pattern on the dressing gown is meant to look like butterfly wings.